How to Allow|Deny SSH Access To A Particular User|Group In Linux


To Make any changes in ssh we have to edit configuration file in Linux.

 File name:
/etc/ssh/sshd_config
After making the any Changes to the above file we have to restart sshd services with below command

 service sshd restart

Configuration Changes Examples for User|Groups

 1) Allow ssh access from only one user

 Edit the ssdd_config file and add|edit below

 AllowUsers himanshu

 2) Allow ssh access from multiple users 

 Edit the ssdd_config file and add|edit below

 AllowUsers himanshu bob kevin

 3) Allow ssh access from a particular group

 AllowGroups dba

 4) Deny ssh access from only one user

 Edit the ssdd_config file and add|edit below

 DenyUsers himanshu

 5) Deny ssh access from multiple users

 Edit the ssdd_config file and add|edit below

 DenyUsers himanshu bob

 6) Deny ssh access from group

 Edit the ssdd_config file and add|edit below

 DenyGroups dba